CVE-2026-68389

Technical Description

In the Linux kernel, the following vulnerability has been resolved:

Bluetooth: hci_qca: Clear memdump state on invalid dump size

qca_controller_memdump() allocates qca->qca_memdump before processing

the first dump packet. For a sequence-zero packet it then disables IBS,

marks memdump collection active, and reads the advertised dump size.

If the controller reports a zero dump size, the error path frees the

local qca_memdump object and returns without clearing qca->qca_memdump

or undoing the collection state. A later memdump work item initializes

its local pointer from qca->qca_memdump and skips allocation when that

pointer is non-NULL, so it can operate on freed memory. The stale

collection and IBS-disabled flags can also leave waiters or later

transmit handling blocked behind an aborted dump.

Clear the saved pointer and memdump state before returning from the

invalid-size path, matching the cleanup used when hci_devcd_init() fails.

A static analysis checker reported the stale memd

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References